Anti-rolling gyro

It lost favor in this application to hydrodynamic roll stabilizer fins because of reduced cost and weight.

However, since the 1990s, there is renewed interest in the device for low-speed roll stabilization of vessels (Tohmei, Seakeeper, Quick MC2, etc.).

The World War I transport USS Henderson, completed in 1917, was the first large ship with gyro stabilizers.

It had two 25-ton, 9-foot (2.7 m) diameter flywheels mounted near the center of the ship, spun at 1100 rpm by 75 hp (56 kW) AC motors.

One of the most famous ships to first use an anti-rolling gyro was the Italian passenger liner SS Conte di Savoia, which first sailed in November 1932.